DE102008056185A1 - light bulb - Google Patents

Abstract

Disclosed is a low or medium power incandescent lamp having a lamp vessel and a lamp cap, wherein the lamp cap is made of polyamide (PA) or polyethylene terephthalate (PET) or polybutylene terephthalate (PBT). The lamp base has a filler of glass fibers and / or glass beads and / or mineral substances. As a result, the manufacturing cost of the lamp cap and thus the bulb are reduced.

Description

Technical area

The Invention is based on incandescent lamps that have a base Plastic have.

State of the art

document DE 196 16 409 A1 discloses a vehicle lamp with a plastic base. As a material, thermosets and thermoplastics are proposed.

Out For reasons of temperature resistance is for such socket z. B. the thermoplastic polyphenylene sulfide (PPS) used.

Utility Model G 82 28 218.8 shows a halogen incandescent lamp with a lamp base, which is composed of a metallic fixing sleeve and a plastic component. In this utility model, a thermoplastic material from the group of polyamides is proposed as the material for the plastic component.

adversely on such incandescent lamps is the cost intensity for the plastic, especially in mass production makes noticeable.

Presentation of the invention

The The object of the present invention is an incandescent lamp in the lower and middle power segment to create their manufacturing costs are reduced.

These The object is achieved by an incandescent lamp according to claim 1.

Especially advantageous embodiments are in the dependent claims described.

The Light bulb according to the invention with low or medium power has a lamp vessel and one Lamp base, wherein the lamp base made of polyamide (PA) or polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) is made. It has the lamp base a filler of glass fibers and / or Glass balls and / or mineral substances. This is the manufacturing cost the lamp base and thus the bulb reduced.

It is preferred if the filler accounts for 20-65% of the lamp socket volume.

at A particularly preferred embodiment is a Sealing ring between lamp vessel and lamp base arranged. This will prevent moisture from entering prevents the lamp vessel and the lamp cap.

at In a particularly preferred embodiment, the sealing ring is made an elastomer, preferably of ethylene-propylene-diene rubber (EPDM) or nitrile rubber (NBR). This is the manufacturing cost the sealing ring and thus the bulb reduced.

at A particularly preferred embodiment is between the lamp base and tabs that protrude from the lamp base, a potting compound attached, which preferably consists of epoxy resin. This is Ingress of moisture between the lamp base and the contact lugs prevented.

at In one embodiment, the contact lugs extend approximately at right angles to a lamp longitudinal axis.

at A particularly preferred development is the power consumption the incandescent lamp according to the invention less as 40 watts. This is a comparatively low heating given the light bulb, resulting in a corresponding resistance of the lamp cap, the sealing ring and the potting compound results.

there it is particularly preferred when the incandescent lamp is a vehicle halogen incandescent lamp ECE category Hl6.

Brief description of the drawings

in the The invention is based on an embodiment be explained in more detail. Show it:

1a an embodiment of a base of a vehicle incandescent lamp according to the invention in a perspective view;

1b an embodiment of a sealing ring of a vehicle incandescent lamp according to the invention in a perspective view; and

2 according to the socket 1a in a further perspective view.

Preferred embodiment the invention

1a shows an embodiment of a base 1 a vehicle light bulb according to the invention in a perspective view. The base 1 and a lamp vessel (not shown) have a common longitudinal axis 2 , in the 1a (and 1b ) is vertical.

The base 1 consists essentially of an approximately cuboid main section 6 , a ring section 8th and a radially recessed receiving ring 10 , wherein the receiving ring 10 (in 1a ) above the ring section 8th is arranged.

Radial or perpendicular to the longitudinal axis 2 extends a connector receptacle 12 which has an approximately oval cross-section. The plug receptacle 12 is at a side surface of the main section 6 attached and is at its from the main section 6 opposite end radially expanded. The plug receptacle 12 points at the outer periphery of its radially expanded portion 3 latching projections 14 on, of which in 1a only one can be seen, and their positions in 2 can be seen.

The above components of the socket 1 are made in one piece as an injection molded part, wherein according to the invention polyamide (PA) or polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) is used. Furthermore, a filler is added according to the invention, which consists of glass fibers and / or glass beads and / or mineral substances. Preferably, this filler has a proportion of 20% to 65% of the base material according to the invention.

Within the recording ring 10 is a receiving opening 16 provided in which two power supply lines 18 are arranged. The power supply lines 18 are inside the main section 6 attached and extend approximately parallel to the longitudinal axis 2 through the recording ring 10 in the direction of the (not shown) lamp vessel. In the final assembly of the vehicle incandescent lamp according to the invention, the free end portions of the power supply lines occur 18 with corresponding power supply of the lamp vessel in electrically conductive contact.

1b shows a sealing ring 20 , on the outer circumference of the receiving ring 10 attachable. The sealing ring engages behind 20 in sections the receiving ring 10 in which he is in between the receiving ring 10 and the ring section 8th groove formed engages.

The sealing ring 20 serves to seal the base 1 especially against moisture and is made according to the invention of ethylene-propylene-diene rubber (EPDM) or nitrile rubber (NBR).

2 shows the base according to the invention 1 according to 1a in another perspective view. In 2 it can be seen that inside the plug receptacle 12 two metallic contact flags 22 are arranged. These are inside the main section 6 each with a power supply 18 electrically connected. The contact flags 22 collar from a soil 24 the plug receptacle 12 out, being approximately parallel to each other and perpendicular to the lamp longitudinal axis 2 are aligned.

On the inner circumference of the plug receptacle 12 between the contact flags 22 is a lead 26 provided, a reversed insertion of a (not shown) plug into the connector receptacle 12 prevented.

About the three on the outer circumference of the connector receptacle 12 distributed locking projections 14 For example, the vehicle light bulb may be mounted in a reflector (not shown).

When mounting the lamp base according to the invention 1 initially remain between the tabs 22 and the floor 24 the plug receptacle 12 Columns with a potting compound 28 be filled. This potting compound 28 serves to seal the interior of the base 1 against moisture and consists according to the invention of epoxy resin.

The existing of said materials base 1 with the potting compound 28 and the sealing ring 20 are inexpensive to manufacture and incandescent lamps up to about 40 watts power consumption sufficiently temperature resistant. In particular, when such an incandescent lamp is used as a halogen vehicle lamp and with corresponding quantities, the use of the materials according to the invention leads to a reduction in the production costs.

Disclosed is an incandescent lamp with low or medium power, which has a lamp vessel and a lamp base, wherein the lamp cap of polyamide (PA) or polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) is made. It has the lamp base a filler of glass fibers and / or Glass balls and / or mineral substances. This is the manufacturing cost the lamp base and thus the bulb reduced.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19616409 A1 [0002]
• - DE 8228218 [0004]

Claims (11)

Low or medium power incandescent lamp with a lamp vessel and a lamp base ( 1 ), characterized in that the lamp base ( 1 ) made of polyamide (PA) or polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), wherein the lamp base ( 1 ) has a filler of glass fibers and / or glass beads and / or mineral substances. Incandescent lamp according to claim 1, wherein the filler accounts for 20-65% of the volume of the lamp cap ( 1 ). Incandescent lamp according to one of the preceding claims, wherein a sealing ring ( 20 ) between lamp vessel and lamp base ( 1 ) is arranged. Incandescent lamp according to claim 3, wherein the sealing ring ( 20 ) is made of an elastomer. Incandescent lamp according to claim 4, wherein the sealing ring ( 20 ) is made of ethylene-propylene-diene rubber (EPDM) or nitrile rubber (NBR). Incandescent lamp according to one of the preceding claims, wherein between the lamp base ( 1 ) and from the lamp base ( 1 ) projecting contact flags ( 22 ) a potting compound ( 28 ) is attached. Incandescent lamp according to claim 6, wherein the potting compound ( 28 ) consists of epoxy resin. Incandescent lamp according to claim 6 or 7, wherein the contact lugs ( 22 ) approximately at right angles to a lamp longitudinal axis ( 2 ). Incandescent lamp according to one of the preceding claims, their power consumption <40 Watt is. Incandescent lamp according to one of the preceding claims, where the light bulb is a vehicle halogen bulb is. Incandescent lamp according to claim 9 and 10, wherein the Halogen bulb belongs to ECE category H16.